> Sendgrid is not an independent email server. Nor is any mail server that interacts with other mail servers. Using an email delivery service to ensure mail g

> Sendgrid is not an independent email server. Nor is any mail server that interacts with other mail servers. Using an email delivery service to ensure mail gets delivered is probably the easiest fix for singularity2001's issue. Otherwise they're looking at changing their hosting, changing their IP, or fighting the nearly impossible battle with Google to get their mail to be accepted by its system.